Finding the Third Proportional to 128,071.50 and 191,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,071.50 : 191,068.50 = 191,068.50 : x
2. Step 2: Convert to fraction form
   128,071.50/191,068.50 = 191,068.50/x
3. Step 3: Cross multiply
   128,071.50x = 191,068.50 × 191,068.50
4. Step 4: Simplify right side
   128,071.50x = 36,507,171,692.25
5. Step 5: Solve for x
   x = 36,507,171,692.25/128,071.50
6. Step 6: Final answer
   x = 285,053.05